Abstract
This article proposes a new rotary transformer topology enabling reduction of leakage inductances and significant improvement of power transfer capability compared to traditional topologies thanks to its interleaved windings and resonant compensation circuits. The proposed rotary transformer features a nonferrite rotating part made of lightweight strong nonconductive and nonmagnetic composite material and a large air gap, allowing safe operation at high rotational speeds. Hence, this novel rotary transformer can enable the adoption of wound rotor synchronous machines for electric or hybrid vehicle traction. The performance of the proposed new topology was evaluated and compared to the conventional one. Significant performance improvement was confirmed. A 10-kW proof of concept prototypes was built, and the test has validated the power transfer capability with 95.9% efficiency.
| Original language | English |
|---|---|
| Article number | 8910464 |
| Pages (from-to) | 277-286 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 56 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2020 |
Funding
Manuscript received February 19, 2019; revised June 13, 2019 and September 30, 2019; accepted November 13, 2019. Date of publication November 21, 2019; date of current version January 16, 2020. Paper 2019-EMC-0122.R2, presented at the 2018 IEEE Energy Conversion Congress and Exposition, Portland, OR, USA, Sep. 23–27, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electric Machines Committee of the IEEE Industry Applications Society. This work was supported in part by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, under Contract DE-AC05-00OR22725, and in part by the U.S. Department of Energy’s Susan Rogers and Oak Ridge National Laboratory’s Burak Ozpineci. (Corresponding author: Tsarafidy Raminosoa). This work was supported in part by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, under Contract DE-AC05-00OR22725, and in part by the U.S. Department of Energy's Susan Rogers and Oak Ridge National Laboratory's Burak Ozpineci. (Corresponding author: Tsarafidy Raminosoa) Color versions of one or more of the figures in this article are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TIA.2019.2955050 This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).
| Funders | Funder number |
|---|---|
| Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office | |
| U.S. Department of Energy | |
| Office of Energy Efficiency and Renewable Energy | DE-AC05-00OR22725 |
| Oak Ridge National Laboratory |
Keywords
- Electric vehicle
- rotary transformer
- rotor excitation
- synchronous machines
- traction motors
